Add imagestream generator #280

Job	Run time
openshift-4 tests: 5.26 - rhel8	4s
openshift-4 tests: 5.26 - rhel7	6s
openshift-4 tests: 5.26 - rhel9	6s
openshift-4 tests: 5.26-mod_fcgid - rhel7	4s
openshift-4 tests: 5.26-mod_fcgid - rhel8	22m 40s
openshift-4 tests: 5.26-mod_fcgid - rhel9	4s
openshift-4 tests: 5.30 - rhel7	25m 28s
openshift-4 tests: 5.30 - rhel8	6s
openshift-4 tests: 5.30 - rhel9	4s
openshift-4 tests: 5.32 - rhel8	4s
openshift-4 tests: 5.32 - rhel7	3s
openshift-4 tests: 5.32 - rhel9	20m 41s
openshift-4 tests: 5.34 - rhel7	4s
openshift-4 tests: 5.34 - rhel8	4s
openshift-4 tests: 5.34 - rhel9	3s
openshift-4 tests: 5.36 - rhel7	6s
openshift-4 tests: 5.36 - rhel8	3s
openshift-4 tests: 5.36 - rhel9	8s
openshift-4 tests: 5.38 - rhel7	3s
openshift-4 tests: 5.38 - rhel8	8s
openshift-4 tests: 5.38 - rhel9	6s
	1h 10m 15s

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